polish global config about sharing postgresql-run socket (#2155)

* polish global config about sharing postgresql-run socket

charts/postgres-operator/crds/operatorconfigurations.yaml

@@ -314,6 +314,9 @@ spec:
                   secret_name_template:
                     type: string
                     default: "{username}.{cluster}.credentials.{tprkind}.{tprgroup}"
+                  share_pgsocket_with_sidecars:
+                    type: boolean
+                    default: false
                   spilo_allow_privilege_escalation:
                     type: boolean
                     default: true

charts/postgres-operator/values.yaml

@@ -191,9 +191,12 @@ configKubernetes:
   # if the user is in different namespace than cluster and cross namespace secrets
   # are enabled via `enable_cross_namespace_secret` flag in the configuration.
   secret_name_template: "{username}.{cluster}.credentials.{tprkind}.{tprgroup}"
+  # sharing unix socket of PostgreSQL (`pg_socket`) with the sidecars
+  share_pgsocket_with_sidecars: false
   # set user and group for the spilo container (required to run Spilo as non-root process)
   # spilo_runasuser: 101
   # spilo_runasgroup: 103
+
   # group ID with write-access to volumes (required to run Spilo as non-root process)
   # spilo_fsgroup: 103